h series sleeves are made from FRM material, and it eats up aftermarket pistons.
Mahle makes a piston that is compatable with it.
Stock H blocks hold alot of power, just the ring lands in the factory pistons dont hold up.
__________________
RIP Kevin Gonzales AKA Slo_Si 9/06
RIP Robert Kolp aka 00ek 4/07
RIP Pablo Garcia aka FatHead 9/07
_Jake D